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Alba Mons
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Alba Mons is a volcano located in the northern Tharsis region of the planet Mars. It is the biggest volcano on Mars in terms of surface area, with volcanic flow fields that extend for at least 1,350 k
Viking image of Alba Mons. The volcano's relief is barely visible in orbital photographs. The broad system of fractures on the volcano's eastern side
Viking image of Alba Mons. The volcano's relief is barely visible in orbital photographs. The broad system of fractures on the volcano's eastern side (right) is called Tantalus Fossae. The narrower fracture system on the western flank is Alba Fossae. (Viking color MDIM 2.1)
MOLA exaggerated relief view of Alba Mons central edifice and summit dome viewed from south (top) and north (bottom). Vertical exaggeration is 10x.
MOLA exaggerated relief view of Alba Mons central edifice and summit dome viewed from south (top) and north (bottom). Vertical exaggeration is 10x.
Central caldera complex of Alba Mons. The calderas are shallow compared to those on other Tharsis volcanoes. Within the larger caldera is a small shie
Central caldera complex of Alba Mons. The calderas are shallow compared to those on other Tharsis volcanoes. Within the larger caldera is a small shield capped by a concentric circular feature (near center). Image is about 200 km (120 mi) across (THEMIS daytime IR mosaic).
Dust mantle at the SW edge of small caldera on Alba Mons (HiRISE).
Dust mantle at the SW edge of small caldera on Alba Mons (HiRISE).
Olympus Mons
Videos
Olympus Mons is a large shield volcano on Mars. As measured by the Mars Orbiter Laser Altimeter, it is 21.287 kilometres high, about 2.5 times the elevation of Mount Everest above sea level. It is Mar
Mars Global Surveyor image showing lava flows of different ages at the base of Olympus Mons. The flat plain is the younger flow. The older flow has la
Mars Global Surveyor image showing lava flows of different ages at the base of Olympus Mons. The flat plain is the younger flow. The older flow has lava channels with levees along the edges. Levees are quite common to lava flows on Mars.
Lava flows on Olympus Mons with older and younger flows labeled, as viewed by HiRISE during the HiWish program
Lava flows on Olympus Mons with older and younger flows labeled, as viewed by HiRISE during the HiWish program
Calderas on the summit of Olympus Mons. The youngest calderas form circular collapse craters. Older calderas appear as semicircular segments because t
Calderas on the summit of Olympus Mons. The youngest calderas form circular collapse craters. Older calderas appear as semicircular segments because they are transected by the younger calderas.
Oblique view of Olympus Mons, from a Viking image mosaic overlain on MOLA altimetry data, showing the volcano's asymmetry. The view is from the NNE; v
Oblique view of Olympus Mons, from a Viking image mosaic overlain on MOLA altimetry data, showing the volcano's asymmetry. The view is from the NNE; vertical exaggeration is 10×. The wider, gently sloping northern flank is to the right. The more narrow and steeply sloping southern flank (left) has low, rounded terraces, features interpreted as thrust faults. The volcano's basal escarpment is prominent.